Cold storage box



' June 14, 1932, W, BROWN 1,863,434

COLD STORAGE BOX Filed Feb.' 25, 1951 BIA 'll/A 'IIIA 7114 la willlam Bro'wrv M BY .1W W/ A ATTORNEYS Patented June 14, 1932 WILLIAM' Bnownor ossritrne, NEW Yonx COLD STORAGE BOX Application ld'rebruary'fae, iesil semina. 518,568.

This invention relates to cold storage boxes, refrigerators or the like, the object being to provide a box acting as a refrigerator wherein meats or other more or less perishable articles may be kept at a temperature which will prevent spoiling, through the use of the cooling effect of ice and salt.

Another object of the invention is to provide a box wherein a heat-resisting containn, er is pro vvided having a door for permitting access to articles being preserved and a readily removable top for permitting access to the cooling tank.

A further object of the invention, more l specifically, is to provide a cold storage box having a top formed of a plurality of removable members and a side door with an interior arrangement of means for supporting a container carrying a refrigerant, the container beingl spaced from the walls of the box for presenting circulating passageways whereby the chilling effect from the refrigerant may be properly circulated throughout the box.

ln the accompanying drawing Figure 1 is a longitudinal vertical sectional view through a cold storage box disclosing an embodiment of the invention.

Figure 2 is a fragmentary vertical section- 3@ al view through Figure 1 on line 2 2.

Figure 3 is a horizontal sectional view through Figure 1 approximately on line 3-3- Figure fl is a detailed perspective view on a reduced scale showing the exterior of the box. Referringl to the drawing by numeral. 1 indicates the outer wall of the box or refrigerator or storage member. said outer wall coacting with an inner Vall 2, said outer and g inner walls being nia-de of wood or other desired material and spaced apart to present various air chambers 3. The walls 1 and 2 are co-extensive with the box except at the points occupied by the door 4 and the removable panels or sections 5 and 6 of the top.

A lining of paper or other heat-resisting material 7 is preferably arranged exteriorly of each of the members forming wall 2 so as to assist in preventing the passage of heat into the interior 0f the box. Aalso preferably the' box" is'iprovidedwith a metal lining 8. The.door'eland'sections 5 and 6 are also preferably provided with a metal lining.

Ther construction just described may be varied widely without departing from the spirit' of the invention and in many respects is' conventional when compared with the ordinaryicefboxI o r refrigerator with the exception 'of'tliedetails of members 4, 5 and 6, and the paperlining 7. In an ordinary ice box or refrigeratorwhere ice is used, the lowest temperature possible is'always slightly above freezing. Where fresh meat is being kept orpi'eserved, it is desirable that the temperature' should be either freezing or slightly below freezing, and consequently thepresent invention vhas provided means whereby this may be accomplished. f y

rShown in the drawing, a refrigerant container 8 is provided, the same being aboxlike structurel of sheet metal or other material which will readily withstand the action of ice water'and'salt. The container is open at the topand' is adapted to havecracked ice placed therein and a certain Apercentage of rock salt. Vhe're there is 90 per cent ice and 10 percent rocksalt, al certain temperature is produced, butif a greater proportion of salt is provided, a lower temperature will be secured On actual tests, a temperature of 25 F. above zero has been secured which is suflicien'tly low to maintain any fresh meat in satisfac'tory'codition for human consumption. It will'be noted that this temperature is 7 below freezing and ordinarily a slightly higher temperature is used.

The Vcontainer 8 is supported by suitable supporting bars 9 connectedto the side walls of the box and is limited in its position forwardly and' rearwardly by the centering braces 10 andthe platform 11. The platform: l1l is provided so that meat, vegetables or other articles may be supported at this point. A removable platform 12 is provided on the bottom of the box for receiving other articles to Ybe preserved. A. pair of supporting' bars 13 are'connected tothe respective sides of the" box and vform runways for the removable drippan 14. It will be noted that the -drip pan 14 is'opposite the upper part of the door opening 15 whereby the pan may be removed and replaced at. any time. Door 4 may be of any desired structure and is preferably hingedly connected to the walls of the box and is preferably provided with a lock, for normally holding the same closed. It will be noted that the sections 5 and 6 are removable, section 6 having a handle 16 whereby it may be easily removed at any time for inspection or for procuring some of the articles supported by platform 11. Also this section is removed when it is desired to provide a new supply of ice and a new supply of salt. Ordinarily, after the box has been functioning for two or three days, it is necessary to provide new ice and new salt. Instead ofremoving the container 8, the water or liquid solution is siphoned out or in some manner drawn out of the container 8 and then a new supply of ice and salt supplied, the same being placed in the container 8 through the opening left when section 6 is removed. After this has been done, the section is replaced and in a little while, the desired temperature within the box is secured, and if the box is not opened, it will be maintained for from three to six days after which a new supply of refrigerant must be provided.

It will be noted that the braces 10 and platform 11 hold the container 8 against shifting materially forwardly or rearwardly while side centering brackets 17 and 18 prevent the container from shifting laterally. This results in providing an air passage in the rear and sides and a large space or opening at the front. The container 8 is preferably made very thin and consequently when the chemical reaction between the salt and ice takes place, a coating will be provided exteriorly of the container 8, said coating being a frozen condensate. The box may be made of any desired size, but preferably the proportions are substantially as shown in the drawing. From the drawing, it will be seen that the container 8 is comparatively large in respect to the remaining spaces in the box. This is desirable in order that a comparatively low temperature may be maintained for a comp aratively long time with a single filling of refrigerant.

I claim: Y

1. A cold storage box inclding a box structure having an opening, a doorrfor closing said opening, a water resistant container ar-y ranged in the box, bars secured to the walls of said box structure positioned above said opening for supporting the container, a pair of brackets secured to two of the walls of said box structure for spacing the container away from the wallsV of the box, a plurality of platforms arranged at different levels for supporting articles, a drip pan and means for slidably supporting the drip pan opposite said door whereby it may be moved through the door at any time.

2. A cold storage box including a box structure having a door opening, a door for nor mally closing said opening, a plurality of bars connected to the box structure intermediate the side thereof interiorly, said bars being positioned above the plane of the door opening, a refrigerant container mounted on said bars, a plurality of U-sha-ped brackets connected'to the walls of the box structure for spacing the container from the walls of the box struc-ture to permit free air circulation around the container, means acting as a removable drip pan arranged beneath said container, and means presenting a platform for supporting articles in the box structure.

WILLIAM BROWN. 

